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Posted to issues@spark.apache.org by "Xiangrui Meng (JIRA)" <ji...@apache.org> on 2018/09/05 19:16:00 UTC

[jira] [Created] (SPARK-25349) Support sample pushdown in Data Source V2

Xiangrui Meng created SPARK-25349:
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             Summary: Support sample pushdown in Data Source V2
                 Key: SPARK-25349
                 URL: https://issues.apache.org/jira/browse/SPARK-25349
             Project: Spark
          Issue Type: Story
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Xiangrui Meng


Support sample pushdown would help file-based data source implementation save I/O cost significantly if it can decide whether to read a file or not.

 

cc: [~cloud_fan]



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